net_sched: Add __rcu annotation to netdev->qdisc
Summary
GSD-2022-1000400: net_sched: add __rcu annotation to netdev->qdisc. Affects Kernel versions >= 470502de5bdb1ed0def643a4458593a40b8f6b66, < d9bd9d4c60c34fe3e71732b8edcba3a880193948. No fix is published. How to fix ↓
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Background
The net_sched package is a component of the Linux Kernel that handles network traffic scheduling and queuing. It is responsible for managing the transmission and reception of packets on network interfaces. The netdev->qdisc data structure represents the queuing discipline associated with a network device. This vulnerability in net_sched involves the lack of __rcu annotation in netdev->qdisc, which can potentially lead to security issues.
Vulnerability Detail
The vulnerability in net_sched arises from the absence of __rcu annotation in netdev->qdisc. This annotation is necessary to ensure proper synchronization and memory management when accessing the queuing discipline associated with a network device. Without this annotation, there is a risk of data corruption or use-after-free vulnerabilities. An attacker could potentially exploit this vulnerability to manipulate network traffic, cause denial-of-service conditions, or execute arbitrary code with elevated privileges.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround mentioned for this vulnerability.
Conclusion
The net_sched vulnerability involving the absence of __rcu annotation in netdev->qdisc can have serious security implications. It is crucial to update the Linux Kernel to the recommended version to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
net_sched is a component of the Linux Kernel that handles network traffic scheduling and queuing.
netdev->qdisc is a data structure in net_sched that represents the queuing discipline associated with a network device.
This vulnerability can potentially lead to data corruption, use-after-free vulnerabilities, manipulation of network traffic, denial-of-service conditions, or execution of arbitrary code with elevated privileges.
To fix this vulnerability, update the Linux Kernel to version v5.10.102 or later.
No specific workaround has been mentioned for this vulnerability.
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